diff --git a/src/Illuminate/Auth/SessionGuard.php b/src/Illuminate/Auth/SessionGuard.php
index 7966eaa7da12..a88e213dbb5c 100644
--- a/src/Illuminate/Auth/SessionGuard.php
+++ b/src/Illuminate/Auth/SessionGuard.php
@@ -253,6 +253,8 @@ public function once(array $credentials = [])
         $this->fireAttemptEvent($credentials);
 
         if ($this->validate($credentials)) {
+            $this->rehashPasswordIfRequired($this->lastAttempted, $credentials);
+
             $this->setUser($this->lastAttempted);
 
             return true;
diff --git a/tests/Auth/AuthGuardTest.php b/tests/Auth/AuthGuardTest.php
index e75efd642c37..d7df6decea9d 100755
--- a/tests/Auth/AuthGuardTest.php
+++ b/tests/Auth/AuthGuardTest.php
@@ -623,6 +623,7 @@ public function testLoginOnceSetsUser()
         });
         $guard->getProvider()->shouldReceive('retrieveByCredentials')->once()->with(['foo'])->andReturn($user);
         $guard->getProvider()->shouldReceive('validateCredentials')->once()->with($user, ['foo'])->andReturn(true);
+        $guard->getProvider()->shouldReceive('rehashPasswordIfRequired')->with($user, ['foo'])->once();
         $guard->shouldReceive('setUser')->once()->with($user);
         $this->assertTrue($guard->once(['foo']));
     }
@@ -637,6 +638,7 @@ public function testLoginOnceFailure()
         });
         $guard->getProvider()->shouldReceive('retrieveByCredentials')->once()->with(['foo'])->andReturn($user);
         $guard->getProvider()->shouldReceive('validateCredentials')->once()->with($user, ['foo'])->andReturn(false);
+        $guard->getProvider()->shouldNotReceive('rehashPasswordIfRequired');
         $this->assertFalse($guard->once(['foo']));
     }